Galileo taught us that it doesn't matter what
size body we have, we are all going to travel at the same velocity while in
the air. The value adopted internationally for gravitational acceleration is 9.806
meters per second per second. That's approximately four or five, maybe
even six meters per second from the height of a starting block.

In contrast: At micro gravity on the space
shuttle, it takes a leisurely four minutes to fall one foot.

Definitions:

Gravity -- The force of attraction between all
objects in the universe. Near the surface of the earth the acceleration
due to gravity is 9.8 m/s2.

Terminal Velocity -- The point at which air
resistance offsets the weight of a falling object, stopping its acceleration.